William smith



W. SMITH.,

(No Model.)

PIPE MOLD.

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NiTnn STATES PATENT Prien..

VILLIAM SMITH, OF SOOITDALE, PENNSYLVANIA, ASSIGNOR OF ONE-HALF TO KENNEY 86 CO., OF SAME PLACE.

PIPE-MOLD.

SPECIFICATION forming part of Letters Patent No. 360,251, dated March 29, 1887.

Application filed January 2, 1886. Serial No. 187,471.

To @ZZ whom it may concern,.-

Be it known that I, WILLIAM SMITH, acitizen of the United States, residing at Scottdale, in the county of Vestmoreland and State of Pennsylvania, have invented a new Apparatus for Casting Cast-Iron Pipes of Large and Small Diameters; and I do hereby declare that the following is a specification of the same.

This invention relates to certain improvementsin molds for casting pipes; and it has for its objects to provide for rapidly and economically producing such castings with the least possible labor and manipulation, as more fully hereinafter set forth. rIhese objects I attain by the means illustrated in the accompanying drawings, in which-- Figure 1 represents a vertical elevation of the iiask which I employ in carrying out my invention. Fig. 2 represents a vertical sectional view of the same, showing the interior of the flask andthe core; Fig. 3, a vertical elevation of the core detached; Fig. 4, a top or plan view of the fiask and its adjuncts; Fig. 5, a transverse horizontal sectionalview taken on the line x x of Fig. 2; Fig. 6, a sectional View of the base of the flask andthe bowl-core of' the flask and Fig. 7 represents detached views of a modification of the expanding-core employedin connection with the flask for molding the pipes.

rlhe letter A indicates the base of the flask, which consists ot' an annular plate of metal having a countersunk recess, B', on the upper side, for the reception of the base ofthe bowllhe bowl-core consists of a short metal tube having a circular base which sets in the recess in the base of the flask. rlhe upper part of the tube is made flaring on the inside, and the tube is of sufficient height to reach to the shoulder of the pattern,where the bowl commences.

The flask is constructed in sections, as indicated by the letters a b c which are bolted or otherwise secured together, and it is divided longitudinally and hinged together on one side, so that the parts may Abe opened to insert the pattern, form the mold, and remove the 1inished casting. On the side opposite the hinges the flask is provided with latches O and a movable bar, D, which is provided with lugs E,

(No modela adapted to engage the latches and lock the parts of the fiask together'.

F is a lever,which is fulcrumed to one part of the flask, and to which the upper end of the bar is pivoted, so that it may be moved to lock or unlock all of the latches simultaneously.

The letter G indicates the core-barrel,which consists of a metallic shell divided longitudinally, as indicated in Figs. 4, 5, and 6 of the drawings. The longitudinal edges of the shell are formed with V-shaped grooves extending their entire length,for the reception of a wedgeshaped bar, G', of metal,whieh serves to keep the shell expanded until the pipe is cast, and then permits it tocontract, so as to drop out of the flask after the casting is completed, the bar being withdrawn for this purpose. bar may be thickened at the back, or formed with a rib, as indicated in Figs. 7 and 5, in order to strengthen it and the shell. At the upper and lower ends the rib is provided with projecting spindles H,to permit the core-barrel to be turned in coatingit in the ordinarymanner. The core-barrel is perforated, as usual, for the escape of the hot gases, and in orderto securely hold the coating compound.

Vhen large castings are to be produced, the shell constituting the core-barrel is provided with internal radial arms, H, two of which are permanently attached to the shell and the other loosely secured thereto, as indicated in Fig. 7 of the drawings, the outer ends of the arms being provided with slots IP, through which the bolts l? pass, in order that the parts may be properly expanded and contracted.

The section O of the flask is made flaring on the inside, so as to form an enlarged space around the bend at the smaller end of the pipe, and the section cl is provided with openings e, which form the gates through which the metal is poured into the mold. At the juncture of the two parts of the iiask. on the inside, are formed angular bends tf/,which are for the purpose of centering the pattern and the pipe when cast within the mold. The flask being empty,'is opened and the pi pc-pattern inserted. The flask is then closed and the spaces are filled in and rammed with the mixture hereinbefore described. The flask is then opened and the pipe-pattern removed and the mold dried. The

The said bowl-core is then inserted in the recess in the base-plate, and the flask is again closed and latched, and when all is secured the expanding and contracting' core-barrel is inserted inthe bowl-core, which is tapered to receive it. A grooved ring provided With four openings, to allow the molten iron to enter the mold, is used as a gate. One of the openings serves as a vent. The ring is placed over the core-barrel inside the ask and rests in the mold. The core-barrel properly expanded and coated With the usual material is then placed in the mold, the pattern having been removed. The lask is then closed and locked, when the mold is ready for pouring.

Having thus described my invention, what I claim, and desire to secure by Letters Patent7 is- 1. The combination, with the flask constructed in two parts hinged together, and pro* shaped grooves in the core-barrel, and is thickened or enlarged along its back7 as and for the purposes specied.

WILLIAM SMITH.

Witnesses:

` B. S. RICHARDSON, J. A. JENNINGs.

of Which are adapted to lit closely the said V- 

